Package com.yahoo.searchlib.aggregation.hll

Class SketchMerger

java.lang.Object

com.yahoo.searchlib.aggregation.hll.SketchMerger

public class SketchMerger
extends Object

This class is responsible for merging any combinations of two Sketch instances.

Constructor Summary

Constructors

Constructor	Description
SketchMerger()

Method Summary

Modifier and Type	Method	Description
Sketch<?>	merge(Sketch<?> left, Sketch<?> right)	Merges one of the two sketches into the other.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Details

SketchMerger

public SketchMerger()

Method Details

merge

public Sketch<?> merge(Sketch<?> left,
 Sketch<?> right)

Merges one of the two sketches into the other. The merge operation is performed in-place is possible.

Parameters:

left - Either a NormalSketch or SparseSketch.

right - Either a NormalSketch or SparseSketch.

Returns:

The merged sketch. Is either first parameter, the other parameter or a new instance.